I want to work with multiple buttons as event handlers

How-to
1

Button When working with multiple event handlers, the button ID? Do you know?

2

Hi,
for example:
In lv_conf.h set

   typedef uint32_t lv_obj_user_data_t;

When create a button :

...
btn[indexbutton] = lv_btn_create( parent, NULL);
lv_obj_set_user_data(btn[indexbutton], idbutton);
lv_obj_set_event_cb(btn[indexbutton],  event);
...

in event function

static void event(lv_obj_t * obj, lv_event_t event)
{
	if(event == LV_EVENT_CLICKED) {
		uint32_t id = lv_obj_get_user_data(obj);
        }
}

Ciao
Walter

2 Likes
3

thank you~~

4

Another option is to keep track of your lv_obj_t * pointers and compare them to the one you receive in the event handler.